Blockchain could provide a "perfect" solution to verifying carbon credits, but the maritime industry must collaborate if it wants to use technology to decarbonise, the head of a shipping tech firm has said.

Chase Bennett, founder and chief executive of London-based Zuma Labs, has warned that carbon credits could be open to being traded fraudulently, whether traders realise it or not.

This has happened before, for instance with renewable identification numbers (RINs), the credits that the US Environmental Protection Agency uses to track and enforce compliance with renewable fuels mandates, he said.